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Add drag start/end signals for Slider

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This commit is contained in:
Haoyu Qiu 2021-12-10 11:19:10 +08:00
parent 5ad9d8bad6
commit 753ae7403f
2 changed files with 21 additions and 0 deletions
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13
doc/classes/Slider.xml
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@ -25,4 +25,17 @@
If [code]true[/code], the slider will display ticks for minimum and maximum values.
</member>
</members>
<signals>
<signal name="drag_ended">
<argument index="0" name="value_changed" type="bool" />
<description>
Emitted when dragging stops. If [code]value_changed[/code] is true, [member Range.value] is different from the value when you started the dragging.
</description>
</signal>
<signal name="drag_started">
<description>
Emitted when dragging is started.
</description>
</signal>
</signals>
</class>

8
scene/gui/slider.cpp
View file

@ -70,8 +70,13 @@ void Slider::gui_input(const Ref<InputEvent> &p_event) {
}
grab.active = true;
grab.uvalue = get_as_ratio();
emit_signal(SNAME("drag_started"));
} else {
grab.active = false;
const bool value_changed = !Math::is_equal_approx((double)grab.uvalue, get_as_ratio());
emit_signal(SNAME("drag_ended"), value_changed);
}
} else if (scrollable) {
if (mb->is_pressed() && mb->get_button_index() == MouseButton::WHEEL_UP) {
@ -264,6 +269,9 @@ void Slider::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_scrollable", "scrollable"), &Slider::set_scrollable);
ClassDB::bind_method(D_METHOD("is_scrollable"), &Slider::is_scrollable);
ADD_SIGNAL(MethodInfo("drag_started"));
ADD_SIGNAL(MethodInfo("drag_ended", PropertyInfo(Variant::BOOL, "value_changed")));
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "editable"), "set_editable", "is_editable");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scrollable"), "set_scrollable", "is_scrollable");
ADD_PROPERTY(PropertyInfo(Variant::INT, "tick_count", PROPERTY_HINT_RANGE, "0,4096,1"), "set_ticks", "get_ticks");